[InstCombine] Turn subtract of vectors of i1 into xor like we do for scalar i1. Match...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@299472 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/InstCombine/InstCombineAddSub.cpp b/lib/Transforms/InstCombine/InstCombineAddSub.cpp
index 4cd7cbc4e00ea38dd4a4e5fcc97d3dfa1cd89585..cb76902321ab040f484cadc00b6a304d62a17d05 100644 (file)
--- a/lib/Transforms/InstCombine/InstCombineAddSub.cpp
+++ b/lib/Transforms/InstCombine/InstCombineAddSub.cpp
@@ -1563,7 +1563,7 @@ Instruction *InstCombiner::visitSub(BinaryOperator &I) {
     return Res;
   }
 
-  if (I.getType()->isIntegerTy(1))
+  if (I.getType()->getScalarType()->isIntegerTy(1))
     return BinaryOperator::CreateXor(Op0, Op1);
 
   // Replace (-1 - A) with (~A).

diff --git a/test/Transforms/InstCombine/sub.ll b/test/Transforms/InstCombine/sub.ll
index 03946c7dbe66885324228de2fdd669b5e7e7cbf2..6e8ef7155829408940df42332d8af786d1445f7b 100644 (file)
--- a/test/Transforms/InstCombine/sub.ll
+++ b/test/Transforms/InstCombine/sub.ll
@@ -744,3 +744,12 @@ define i32 @test52(i32 %X) {
   %res = and i32 %sub, 127
   ret i32 %res
 }
+
+define <2 x i1> @test53(<2 x i1> %A, <2 x i1> %B) {
+  %sub = sub <2 x i1> %A, %B
+  ret <2 x i1> %sub
+; CHECK-LABEL: @test53(
+; CHECK-NEXT: %sub = xor <2 x i1> %A, %B
+; CHECK-NEXT: ret <2 x i1> %sub
+}
+